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Old 04-12-2022, 10:42 AM
Join Date: Apr 2022
Posts: 1
W124 Serpentine Belt and water pump

So I have a 1992 300E 2.6L and I had a mechanic leave the serpentine belt off my car in my drive way and he never came back. The fan is still on, he removed the fan guard and shroud. I tried to put the belt back on but it seems impossible even following the diagram order. Can the belt be put back on with the fan still on or do I have to remove the fan? Also the benz started having all the lights on the dash turn on when i turned the sterring wheel, i was told it had something to do with the drive belt, or belt tensioner so I called a mechanic over and he said the water pump was going bad and that was causing the car to not generate the energy needed to drive it because the water pump pully didnt turn easily. Does that sound correct?

Last edited by Matt at Pelican Parts; 04-27-2022 at 09:33 AM.
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Old 04-13-2022, 01:23 AM
HGV HGV is offline
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Join Date: Sep 2001
Location: San Francisco
Posts: 424
Firstly, the belt can be put on with the fan in place. You need to loosen the belt tensioner to be able to put the belt in. Not sure what type of tensioner your car has but you should be able to find out online. Not sure about your lights, but the water pump should be able to spin freely by hand. If not, that is a problem.
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Old 04-13-2022, 09:22 AM
HGV HGV is offline
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Old 04-14-2022, 02:46 PM
Join Date: Jan 2016
Posts: 262
We recommend removal of the fan for more access and ease of the job.

Also, the lights are likely coming on your dash because the drive belt isn't on so there's nothing turning the alternator, water pump, etc.


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